1-Phenylpyrrole is an inhibitor of CYP450 dependant monooxygenase activity in microsomes from rat liver.

Ornidazole(Ro 7-0207) is a 5-nitroimidazole derivative with antiprotozoal and antibacterial properties against anaerobic bacteria.

Hydroxyprogesterone Caproate is a synthetic progestational agent. It binds to and activates nuclear progesterone receptors in the reproductive system and inhibits ovulation and an alteration in the cervical mucus and endometrium.